noun🔗Share海底扩张，洋底扩张 The outward movement of the seafloor from central underwater ridges as a result of plate tectonics; the major cause of continental drift."Scientists study seafloor spreading to understand how continents move over millions of years. "科学家研究海底扩张（洋底扩张），从而了解大陆在数百万年间是如何移动的。geologygeographyoceanenvironmentnaturescienceChat with AIVocabulary GamePractice Reading
